Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with GHK Cu Peptide for Skin & Hair Facial Serum & Scalp Solution Biossance Squalane + Copper Peptide Rapid Plumping Serum GHK Cu is more than a skincare trend its a copper peptide involved in repair, regeneration, and cellular signaling., This peptide has been studied for its connection to collagen production, skin Your skin heals better when your barrier is strong. Topical GHK Cu peptide helps support that process